Vibrator.



I. G. ORSWELL VIBRATOR.

APPLICATION FILED JUNES, 1908.

Patented Dec. 23, 1913.

witnesses Inventor: Israel C Orswell.

UNITED STATES agrant? orrr ISRAEL 0. ORSWELL, OF HYDE PARK,lvIIiSSAOHUSETTS, ASSIGNOR- TO ORSWELL IGNITERCOMPAITY, OF BOSTON,MASSACHUSETTS, CORPORATION OF MAINE.

VIBRATQR.

Specification of Letters Patent.

- To all whom it may concern:

Be it known that I, ISRAEL-C. Onswnnn, a

' citizen of the United States, and a resident an ignition system.

of Hyde Park, in the county of Norfolk and State of Massachusetts, haveinvented. an Improvement in Vibrators, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

My invention relates to vibrators. being more particularly concernedwith the provision of an efficient vibrator device for use in connectionwith induction coils such as are employed for ignition systems or anyother purposes for which such devices are employed.

My invention will be best understood by reference to the followingdescription when taken in connection with the accompanying illustrationof one specific embodiment thereof, while its scope will be moreparticularly pointed out in the appended claims.

In the drawings: Figure 1 is a side ele-- vation, partly brokenaway,showing the vibrator parts mounted within an inclosing casing;'Fi a2 isa side elevation, on an enlarged scale, showing more particularlythe details of the vibrator parts; and, Fig. .3 is a plan view of thevibrator as seen in Fig. 2.

Referring to the drawings and to the specific embodiment of my inventionthere illustrated, I have shown a. vibrating device mounted upon asuitable support, such as the block 1 of insulating material, the samebeing fixedly or otherwise secured tothe upper partof the casing 2,which latter is provided with the removable cover 3. The casing isprovided with external binding posts 4 and thumb nuts 5, by means 01which connection may be had, as is usual in this class of devices, to asuitable source of electromotive force such as a battery and to theterminals of one or more induction coils, not herein shown, but thearrangement and relation of whichwill be clear by reference t6 my priorPatent No. 878, l67, showing the employment of a vibrator in connectionwith Referring more particularly to Fig. l, the insulating support 1 ismounted upon preferably metallic conductive brackets 6 which are rigidlysecured to the sides of the casing" by the binding posts or screws 5,there being provided suitable insulation 7 between the brackets and themetallic walls of the casing 2.. and other insulation 8 to insulate thebinding posts also from the casing. The casing 2 is constructed tocontain the condenser 9, the latter connected in shunt about thevibrator contacts.

One contact 10 is inovably mounted upon the resilientmetal strip 11, thelatter secured to the insulating support 1 by means of one or morescrews 12 which pass through the support and into the supporting bracket6, thereby completing electrical connection with the binding post andattached lead wire. The other or stationary contact 13 is mounted uponthe overhanging metallic strip 14, the latter being directly connectedby means of the wire 15 to one terminal 16 of the condenser 9, and alsothrough the wire 17 with one terminal of the magnet coil 18. The otherterminal 19 of the condenser is connected by means of the wire 20, whichpasses upward through the insulation support and the strip 11, to thescrew 12, the condenser thereby being connected in shunt between the twocontacts The other terminal ofthe magnet coil is connected by means ofthe wire 21 to the screw 22, the latter passing downward through thesupport into the underlying bracket (3 and thereby connecting the coilto the remaining binding post l and the lead wire.

The above connection provides a condenser casing which also acts as asupport for the vibrator. the connections from the binding post to theibrator being so established that they are not. broken or disturbed bythe removal of the cover for inspection'of the parts.

The vibrator magnets are provided with cores 23 secured at the lowerends to a base piece 24:, preferably of magnetic material, and at theirupper ends provided with a connecting plate 25 preferably ofnon-magnetic material, the said base piece, plate and core forming amagnet frame-which preferably, though not necessarily, is employed tosupport also the armature and its resiliside of the coils, carries ahammer member 28 adapted, "on attraction of the armature by the vibratormagnet, to strike a hammerlike'blow upon the end 29 of the underlyingresilient contact member 11, the latter acting as an anvil device,thereby causing theseparation of the two contacts 10 and 13 and asuitable interruption of the primary circuit. 4

I have found it to be preferable, in order .to secure the full hammereffect of the arinstead of causing the armature,

mature movement, to cause the armature to strike the movable contactmember at a point well removed from the fulcrumfixed end of the spring26, the armature, therefore, for this purpose, overlying the magnets andcarrying the hammer member 28-at the side thereof opposite from thepoint of its attachment to the plate 25. If the leaf spring 26 is aloneemployed to control the movements of the armature, the moment the hammermember 28 touches the anvil device 29 in its attractive movement,thereby meeting with resistance at that point, further attractive effectof the magnet tends to deform or straighten the resilient spring member26, as it should, to continue to swing as a hinge about the point ofspringattachment. This diminishes somewhat at the critical time the;efi'ect of the armaturefblow upon the anvil'member 29 and impairs theefficiency of the apparatus in giving a sharp, quick break'to thecontacts. I have,-therefore,' provided an additional attachment 30 forthe armature preferablyv stiffer than the spring 26, such attachment, inthe form shown, consisting of a resilient metallic strip, rigidlysecured at one end to the armature, but having a free end 31 overlyingand in contact with the fixed support 25 at the point of attachment ofthe spring thereto. This additional attachment 30 does not affect theresiliency of the'spring or its action, so long as the armature and thespring continue to swing about the fulcrumpoint without deformation.But, if, through the hammer meeting resistance in contacting with thedevice 29, the attractive effect of the magnet tends to pull down theinner end of the irmature and straighten 'the spring, such tendency isresisted by the contact "of the free end.3l of the stiffer springattachment with the underlying part against which it rests. It,therefore, serves to com el the armature structure to swing as a rigistructure about its fulcrum point while, however,'permitting the fullresiliency of the spring 26. at all times to be availed of.

In my earlier patent, to which reference has already been made,provision was made for an adjustable stop to limit the outward springmovement of the, armature. Such adjustable stop, however, was providedupon the removable cover of the apparatus and,

in practice, frequently became disarranged when the cover was removed.It also provided a somewhat inexact adjustment owing to the resiliencyof the cover itself. One obj ect of my present invention is toprovide arigid adjustable stop for the outward movement of the armature by meansof which any required adjustment can be maintained at all times. Tosecure this in the illustrated form of my invention I provide a threadedstud 32 fixedly secured to the plate 25 and projecting-outwardlytherefrom through an opening of suitable size in the armature. Upon theend of such stud I- provide the threaded adjusting nut 33 having thedownwardly projecting sleeve portion 34 adapted to overlie and contactwith ,the armature,

such portion serving as 'an adjustable abut-,

ment to limit the outward armature movement.

Suitable means are preferably rovided to lock the adjusting nutin any seected posi tion, the under surface of the head being herein notched, asat 35, and adapted to engage a toothed member 36 which may be pressedinto the notched portion by means of the resilient arm 37, having itsopposite end fixedly secured to the end ofthe connecting plate 25.Pressure of the arm 37 and the tooth 36 against the under side of thenut not only looks the latter in position but takes up any backlashexisting between the threads of the nut and of the screw, so that suchbacklash cannot in any wise affect the designed adjustment.

In the illustrated form of my invention I have also provided means foradj ustingmore or less the resiliency of the movable contact member 11.Such means herein are afforded by the resilient plate 38 which, asshown,

short distance from its attachment to the in-.

sulation support, so that as the forked end 42 eeann;

is more or less elevated the resilient member 11 becomes more or lessstitlened.

, In order to retain the cover 8 Firmly in posi tion any suitable meansmay be provided, but herein I have supplied a spring fastening engagingthe inner walls of the cover so as to hold the latter tree frominterference with any of the vibrator parts and, at toe same time, beinginvisible when the cover is in position. Such a form of fastening iscomprehended in the spring tongue pie es l3, which are provided one ateach side of the casing, being clamped in upright position by thebinding screw 4e between the wall of the casing and the connected partsThese resilient tongue pieces 43 project upwardly and are suitablyformed to snap over indentations 44 formed in "the side walls of thecover to hold the latter firmly in position.

While I have herein shown and described one form ofmy invention forillustrative purposes and have disclosed and discussed in detail theconstruction and arrangement incidental to one specific applicationthereof, it is to be understood that the invention is limited neither tothe mere details or relative arrangement or" parts, nor to its specificapplication herein shown, but that extensive deviations from theillustrated form or embodiment of the invention may. be made Withoutdeparting from the principles thereof.

Having thus described my invention, what I claim is:

1. A vibrator having a magnet and a swinging armature; a fulcrumattachment for the armature having its main portion freely resilient;and means -for compelling a fulcrum action of the attachment during thearmature movement.

1 2. A vibrator having a magnet, an arma ture member, a support having aresilient body portion therefor, the latter being connected to a fixedpart of the device a contact carrying member adapted to be struck animpact blow by the opposite end of said armature, and means forpreventing deformation of the body portion of said resilient connectionbetween its fixed end and the armature.

3. A vibrator having a magnet, a fixed support and armature memberhaving an intermediate resilient support connecting it to the fixedsupport, a contact carrying member adapted. to receive a hammer blowfrom the armature member and located on the opposite side of the magnetfrom the fixed support, and a relatively stiller mem-- ber attached tosaid armature and also having engagement with said fixed support.

4. A vibrator having an armature member, amagnet, a fixed support havinga contact member engaged by said armature memoer on its attractedmovement, a spring having one end attached [0 said support and the otherto said armature member, and a relatively stitl'er member having one endat: tached to the armature and the other in tree engagement with saidsupport.

5. A. vibrator having'the coil 18, the armature 27, the spring support26 having one end fixed and the opposite end carrying the hammer member28, the contact member .29, and the relatively stiff member 30 havingone end attached to the spring and the opposite end free to move uponthe fixed support.

G. A vibrator having a magnet, a support therefor, an armature, acontact carrying member adapted to be struck on the attracted movementof the armature, a plate con necting the pole pieces of the magnet, andmeans mounted upon said plate for adjusting the outward movement of thearmature.

7. A vibrator device having a magnet, an armature, a resilientattachment having a fixed support at one side of said magnet, a hammerdevice carried by said armature at the opposite side of said magnet, aresilient contact carrying member adapted to be engaged by said hammerdevice, said member having a fixed connection to a suitable support, afixed and movable contact intermediate said hammer device and fixedconnection, and means for Varying the resistance of said resilientcontact carrying member to the armature.

8. A vibrator having a contact carrying member, an armature carryingmember adapted to strike the contact carrying member an impact blow, aresilient support for the armature member having an attachment to afixed part of the'device, and means to prevent deformation of thesupport between the armature and the/fixed point of attachment of theresilient support.

0. A vibrator having a magnet; a contact carrying member on one side; asupport on the other side; an armature; a freely resilient memberconnecting said armature to said support; and means to enforce swingingmovement of said member about said support.

10. A vibrator havinga-magnet, an armature carrying member, a contactcarrying member adapted to receive a hammer blow from the armature, saidcontact carrying member being located on the opposite side of the magnetfrom the support for the armature carrying member, a freely resilientattachment for the armature and means to. compel the armature member toswing rigidly about its fulcrum point, while permitting the resiliencyof the body of its attachment to be available.

11. A vibrator having a magnet, a fixed support, a resilient armaturecarrying memher having one end attached to said fixed support, anarmature carried by said resilient member, a relatively stiff springmember having one end secured to the free part of said armature carryingmembe'r and the opposite end in contact With the fixed support, and amovable contact carrying member having a part underlying the arma- 10ture carrying member and adapted to be struck an impact blow thereby onthe attraction of the armature by the magnet.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing Witnesses.

I ISRAEL 0. ORSVVELL.

Witnesses: I

THOMAS B. Boom- EVERETT S. EMERY.

